TY  - RPRT
TI  - Lightness models, gradient illusions, and curl.
AU  - L E Arend
AU  - R Goldstein
PY  - 1987
DO  - 10.3758/bf03211515
UR  - https://pubmed.ncbi.nlm.nih.gov/3658639/
ID  - 3658639
ER  -